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class="post-meta-date"><i class="far fa-calendar-alt fa-fw post-meta-icon"></i><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2020-11-22T06:21:12.000Z" title="发表于 2020-11-22 14:21:12">2020-11-22</time><span class="post-meta-separator">|</span><i class="fas fa-history fa-fw post-meta-icon"></i><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2021-01-10T12:27:40.736Z" title="更新于 2021-01-10 20:27:40">2021-01-10</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E5%90%8E%E7%AB%AF%E5%AD%A6%E4%B9%A0/">后端学习</a></span></div><div class="meta-secondline"> <span class="post-meta-separator">|</span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span class="post-meta-label">字数总计:</span><span class="word-count">1.4k</span><span class="post-meta-separator">|</span><i class="far fa-clock fa-fw post-meta-icon"></i><span class="post-meta-label">阅读时长:</span><span>5分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv"><i class="far fa-eye fa-fw post-meta-icon"></i><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"></span></span></div></div></div></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><h1 id="Python基本知识点-一"><a href="#Python基本知识点-一" class="headerlink" title="Python基本知识点(一)"></a>Python基本知识点(一)</h1><blockquote>
<p>纯属随笔记录，具体详细教程，请查阅<a target="_blank" rel="noopener" href="https://docs.python.org/zh-cn/3/">Python中文文档</a></p>
</blockquote>
<blockquote>
<p>因为Python是基于c语言开发的所以很多相同的语法基础知识不写，只记一些不同的知识点。</p>
</blockquote>
<ul>
<li><h2 id="注释："><a href="#注释：" class="headerlink" title="注释："></a>注释：</h2><ul>
<li><h3 id="单行注释："><a href="#单行注释：" class="headerlink" title="单行注释："></a>单行注释：</h3><ul>
<li><p>以#开头，#右边的所有东西当做说明，而不是真正要执行的程序，起辅助说明作用。</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="comment"># 我是注释，可以在里写一些功能说明之类的哦 </span></span><br><span class="line">print(<span class="string">&#x27;hello world&#x27;</span>)</span><br></pre></td></tr></table></figure>
</li>
</ul>
</li>
<li><h3 id="多行注释"><a href="#多行注释" class="headerlink" title="多行注释:"></a>多行注释:</h3><ul>
<li><p>以’‘’…..‘’‘包裹，’‘’之间的东西当作说明或者注释。</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="string">&#x27;&#x27;&#x27; </span></span><br><span class="line"><span class="string">我是多行注释， 可以写很多很多行的功能说明 哈哈哈。。。 </span></span><br><span class="line"><span class="string">&#x27;&#x27;&#x27;</span> </span><br><span class="line">print(<span class="string">&#x27;hello world&#x27;</span>)</span><br></pre></td></tr></table></figure>
</li>
</ul>
</li>
<li><h3 id="中文注释："><a href="#中文注释：" class="headerlink" title="中文注释："></a>中文注释：</h3><ul>
<li><p>python程序中，可以支持中文，但是需要添加中文注释。如果直接在程序中用到了中文，比如：</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">print(<span class="string">&#x27;你好&#x27;</span>)</span><br></pre></td></tr></table></figure>
</li>
<li><p>如果直接运行输出，程序会出错。解决的办法为：在程序的开头写入如下：</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="comment">#coding=utf-8</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>修改之后的程序:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="comment">#coding=utf-8 </span></span><br><span class="line">print(<span class="string">&#x27;你好&#x27;</span>)</span><br></pre></td></tr></table></figure>
</li>
<li><p>运行结果:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">你好</span><br></pre></td></tr></table></figure>

</li>
</ul>
<h4 id="注意："><a href="#注意：" class="headerlink" title="注意："></a>注意：</h4><ul>
<li><p>在python的语法规范中推荐使用的方式：</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="comment"># -*- coding:utf-8 -*-</span></span><br></pre></td></tr></table></figure>


</li>
</ul>
</li>
</ul>
</li>
</ul>
<hr>
<ul>
<li><h2 id="变量及类型"><a href="#变量及类型" class="headerlink" title="变量及类型:"></a>变量及类型:</h2><ul>
<li><p>变量可以是<strong>任意的数据类型</strong>，在程序中用一个变量名表示。</p>
</li>
<li><p>变量名必须是**大小写英文，数字和下划线(_)**的组成，且不能以数字开头，如:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">a = <span class="number">1</span> <span class="comment">#变量a是一个整数</span></span><br><span class="line">t_007 = <span class="string">&#x27;T007&#x27;</span> <span class="comment">#变量t_077是一个字符串</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>赋值( 比如a= ‘ABC’ )时，Python解释器干了两件事:</p>
<ul>
<li>在内存中创建一个 ‘ ABC ’ 的字符串。</li>
<li>在内存中创建一个名为a的变量，并把它指向 ‘ABC’。</li>
</ul>
</li>
</ul>
<hr>
</li>
<li><h2 id="标识符和关键字："><a href="#标识符和关键字：" class="headerlink" title="标识符和关键字："></a>标识符和关键字：</h2><ul>
<li><h3 id="什么是关键字"><a href="#什么是关键字" class="headerlink" title="什么是关键字:"></a>什么是关键字:</h3><blockquote>
<p>python一些具有特殊功能的标示符，这就是所谓的关键字。</p>
<p>关键字，是python已经使用的了，所以不允许开发者自己定义和关键字相同的名字的标示符。</p>
</blockquote>
</li>
<li><h2 id="查看关键字"><a href="#查看关键字" class="headerlink" title="查看关键字:"></a>查看关键字:</h2><figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="meta">&gt;&gt;&gt; </span><span class="keyword">import</span> keyword </span><br><span class="line"><span class="meta">&gt;&gt;&gt; </span>keyword.kwlist</span><br></pre></td></tr></table></figure>

<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="keyword">and</span> <span class="keyword">as</span> <span class="keyword">assert</span> <span class="keyword">break</span> <span class="class"><span class="keyword">class</span> <span class="title">continue</span> <span class="title">def</span> <span class="title">del</span> <span class="title">elif</span> <span class="title">else</span> <span class="title">except</span> <span class="title">exec</span> <span class="title">finally</span> <span class="title">for</span> <span class="title">from</span> <span class="title">globalif</span> <span class="title">in</span> <span class="title">import</span> <span class="title">is</span> <span class="title">lambda</span> <span class="title">not</span> <span class="title">or</span> <span class="title">pass</span> <span class="title">print</span> <span class="title">raise</span> <span class="title">return</span> <span class="title">try</span> <span class="title">while</span> <span class="title">with</span> <span class="title">yield</span></span></span><br></pre></td></tr></table></figure>

</li>
</ul>
<hr>
</li>
<li><h2 id="输出"><a href="#输出" class="headerlink" title="输出:"></a>输出:</h2><ul>
<li><h3 id="普通输出"><a href="#普通输出" class="headerlink" title="普通输出:"></a>普通输出:</h3><ul>
<li><p>python中普通的输出:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line"><span class="comment"># 打印提示 </span></span><br><span class="line">print(<span class="string">&#x27;hello world&#x27;</span>)</span><br></pre></td></tr></table></figure>
</li>
</ul>
</li>
<li><h3 id="格式化输出"><a href="#格式化输出" class="headerlink" title="格式化输出:"></a>格式化输出:</h3><h4 id="格式化操作的目的"><a href="#格式化操作的目的" class="headerlink" title="格式化操作的目的:"></a>格式化操作的目的:</h4><ul>
<li><p>比如有以下代码:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">pirnt(<span class="string">&quot;我今年10岁&quot;</span>) </span><br><span class="line">pirnt(<span class="string">&quot;我今年11岁&quot;</span>) </span><br><span class="line">pirnt(<span class="string">&quot;我今年12岁&quot;</span>) ...</span><br></pre></td></tr></table></figure>
</li>
<li><p>想一想:</p>
<blockquote>
<p>在输出年龄的时候，用了多次”我今年xx岁”，能否简化一下程序呢？？？</p>
</blockquote>
</li>
<li><p>答:</p>
<blockquote>
<p>字符串格式化</p>
</blockquote>
</li>
</ul>
<h4 id="什么是格式化"><a href="#什么是格式化" class="headerlink" title="什么是格式化:"></a>什么是格式化:</h4><ul>
<li><p>看如下代码:</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">age = <span class="number">10</span></span><br><span class="line">print(<span class="string">&quot;我今年%d岁&quot;</span>%age) </span><br><span class="line"></span><br><span class="line">age += <span class="number">1</span> </span><br><span class="line">print(<span class="string">&quot;我今年%d岁&quot;</span>%age) </span><br><span class="line"></span><br><span class="line">age += <span class="number">1</span> </span><br><span class="line">print(<span class="string">&quot;我今年%d岁&quot;</span>%age) </span><br><span class="line">...</span><br></pre></td></tr></table></figure>
</li>
<li><p>在程序中，看到了<code>%</code>这样的操作符，这就是Python中格式化输出。</p>
<figure class="highlight python"><table><tr><td class="code"><pre><span class="line">age = <span class="number">18</span> </span><br><span class="line">name = <span class="string">&quot;xiaohua&quot;</span> </span><br><span class="line">print(<span class="string">&quot;我的姓名是%s,年龄是%d&quot;</span>%(name,age))</span><br></pre></td></tr></table></figure>

</li>
</ul>
<h4 id="常用的格式符号"><a href="#常用的格式符号" class="headerlink" title="常用的格式符号:"></a>常用的格式符号:</h4><ul>
<li><p>下面是完整的，它可以与<code>％</code>符号使用列表:</p>
<table>
<thead>
<tr>
<th align="center">格式符号</th>
<th align="center">转换</th>
</tr>
</thead>
<tbody><tr>
<td align="center">%c</td>
<td align="center">字符</td>
</tr>
<tr>
<td align="center">%s</td>
<td align="center">通过str()字符串转换来格式化</td>
</tr>
<tr>
<td align="center">%i</td>
<td align="center">有符号十进制整数</td>
</tr>
<tr>
<td align="center">%d</td>
<td align="center">有符号十进制整数</td>
</tr>
<tr>
<td align="center">%u</td>
<td align="center">无符号十进制整数</td>
</tr>
<tr>
<td align="center">%o</td>
<td align="center">八进制整数</td>
</tr>
<tr>
<td align="center">%x</td>
<td align="center">十六进制整数(小写字母)</td>
</tr>
<tr>
<td align="center">%X</td>
<td align="center">十六进制整数(大写字母)</td>
</tr>
<tr>
<td align="center">%e</td>
<td align="center">索引符号(小写‘e’)</td>
</tr>
<tr>
<td align="center">%E</td>
<td align="center">索引符号(大写‘E’)</td>
</tr>
<tr>
<td align="center">%f</td>
<td align="center">浮点实数</td>
</tr>
<tr>
<td align="center">%g</td>
<td align="center">%f和%e的简写</td>
</tr>
</tbody></table>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<pre><code>#### 换行输出：

- 在输出的时候，如果有 `\n` 那么，此时` \n` 后的内容会在另外一行显示

  &lt;!--hexoPostRenderEscape:&lt;figure class=&quot;highlight python&quot;&gt;&lt;table&gt;&lt;tr&gt;&lt;td class=&quot;code&quot;&gt;&lt;pre&gt;&lt;span class=&quot;line&quot;&gt;print(&lt;span class=&quot;string&quot;&gt;&amp;quot;1234567890-------&amp;quot;&lt;/span&gt;) &lt;span class=&quot;comment&quot;&gt;# 会在一行显示 &lt;/span&gt;&lt;/span&gt;&lt;br&gt;&lt;span class=&quot;line&quot;&gt;&lt;/span&gt;&lt;br&gt;&lt;span class=&quot;line&quot;&gt;print(&lt;span class=&quot;string&quot;&gt;&amp;quot;1234567890\n-------&amp;quot;&lt;/span&gt;) &lt;span class=&quot;comment&quot;&gt;# 一行显示1234567890，另外一行显示-------&lt;/span&gt;&lt;/span&gt;&lt;br&gt;&lt;/pre&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/figure&gt;:hexoPostRenderEscape--&gt;</code></pre>
<hr>
<ul>
<li><h2 id="输入"><a href="#输入" class="headerlink" title="输入:"></a>输入:</h2><ul>
<li><h3 id="input"><a href="#input" class="headerlink" title="input():"></a>input():</h3><figure class="highlight python"><table><tr><td class="code"><pre><span class="line">password = input(<span class="string">&quot;请输入密码:&quot;</span>) </span><br><span class="line"></span><br><span class="line">print(<span class="string">&#x27;您刚刚输入的密码是:&#x27;</span>, password)</span><br></pre></td></tr></table></figure>

<ul>
<li>input()的小括号中放入的是，提示信息，用来在获取数据之前给用户的一个简单提示</li>
<li>input()在从键盘获取了数据以后，会存放到等号左边的变量中</li>
<li>input()函数接受的输入必须是表达式</li>
</ul>
</li>
</ul>
<hr>
</li>
<li><h2 id="运算符："><a href="#运算符：" class="headerlink" title="运算符："></a>运算符：</h2><ul>
<li><h3 id="逻辑运算符："><a href="#逻辑运算符：" class="headerlink" title="逻辑运算符："></a>逻辑运算符：</h3><ul>
<li><p>一下假设变量a = 10，变量b = 20:</p>
<table>
<thead>
<tr>
<th align="center">运算符</th>
<th align="center">描述</th>
<th align="center">实例</th>
</tr>
</thead>
<tbody><tr>
<td align="center">and</td>
<td align="center">布尔 “与”</td>
<td align="center">(a and b) 返回 20</td>
</tr>
<tr>
<td align="center">or</td>
<td align="center">布尔 “或”</td>
<td align="center">(a or b) 返回 10</td>
</tr>
<tr>
<td align="center">not</td>
<td align="center">布尔 “非”</td>
<td align="center">not(a and b) 返回 False</td>
</tr>
</tbody></table>
</li>
</ul>
<hr>
</li>
<li><h3 id="成员运算符："><a href="#成员运算符：" class="headerlink" title="成员运算符："></a>成员运算符：</h3><table>
<thead>
<tr>
<th align="center">运算符</th>
<th align="center">描述</th>
<th align="center">实例</th>
</tr>
</thead>
<tbody><tr>
<td align="center">in</td>
<td align="center">如果在指定的序列中找到值返回 True，否则返回 False</td>
<td align="center">x 在 y 序列中，如果 x 在 y 序列中返回 True</td>
</tr>
<tr>
<td align="center">not in</td>
<td align="center">如果在指定的序列中没有找到值返回 True，否则返回False</td>
<td align="center">x 不在 y序列中，如果 x 不这 y 序列中返回 True</td>
</tr>
</tbody></table>
<hr>
</li>
<li><h3 id="身份运算符："><a href="#身份运算符：" class="headerlink" title="身份运算符："></a>身份运算符：</h3><table>
<thead>
<tr>
<th align="center">运算符</th>
<th align="center">描述</th>
<th align="center">实例</th>
</tr>
</thead>
<tbody><tr>
<td align="center">is</td>
<td align="center">is 是判断两个标识符是不是引用自一个对象</td>
<td align="center">x is y，类似id(x) == id(y)，如果引用的是同一个对象则返回True，否则返回 False</td>
</tr>
<tr>
<td align="center">is not</td>
<td align="center">is not 是判断两个标识符是不是引用自不同对象</td>
<td align="center">x is not y，类似 id(a) != id(b)。如果引用的不是同一个对象则返回结果 True，否则返回 False</td>
</tr>
</tbody></table>
<ul>
<li><h4 id="注意"><a href="#注意" class="headerlink" title="注意:"></a>注意:</h4><p><code>id(x)</code> 函数用于获取对象内存地址。</p>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<hr>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">六根清静</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="https://liugenqingjing2.coding.me/2020/11/22/Python%E5%9F%BA%E7%A1%80%E7%9F%A5%E8%AF%86%E7%82%B9-%E4%B8%80/">https://liugenqingjing2.coding.me/2020/11/22/Python基础知识点-一/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://liugenqingjing2.coding.me" target="_blank">小何blog (记录美好)</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/Python/">Python</a><a class="post-meta__tags" 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(也可以点上面的logo)，一起交流学习</div></div></div><div class="sticky_layout"><div class="card-widget" id="card-toc"><div class="card-content"><div class="item-headline"><i class="fas fa-stream"></i><span>目录</span></div><div class="toc-content"><ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link" href="#Python%E5%9F%BA%E6%9C%AC%E7%9F%A5%E8%AF%86%E7%82%B9-%E4%B8%80"><span class="toc-number">1.</span> <span class="toc-text">Python基本知识点(一)</span></a><ol class="toc-child"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%B3%A8%E9%87%8A%EF%BC%9A"><span class="toc-number">1.1.</span> <span class="toc-text">注释：</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%8D%95%E8%A1%8C%E6%B3%A8%E9%87%8A%EF%BC%9A"><span class="toc-number">1.1.1.</span> <span class="toc-text">单行注释：</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E5%A4%9A%E8%A1%8C%E6%B3%A8%E9%87%8A"><span class="toc-number">1.1.2.</span> <span class="toc-text">多行注释:</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%B8%AD%E6%96%87%E6%B3%A8%E9%87%8A%EF%BC%9A"><span class="toc-number">1.1.3.</span> <span class="toc-text">中文注释：</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#%E6%B3%A8%E6%84%8F%EF%BC%9A"><span class="toc-number">1.1.3.1.</span> <span class="toc-text">注意：</span></a></li></ol></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%8F%98%E9%87%8F%E5%8F%8A%E7%B1%BB%E5%9E%8B"><span class="toc-number">1.2.</span> <span class="toc-text">变量及类型:</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%A0%87%E8%AF%86%E7%AC%A6%E5%92%8C%E5%85%B3%E9%94%AE%E5%AD%97%EF%BC%9A"><span class="toc-number">1.3.</span> <span class="toc-text">标识符和关键字：</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E4%BB%80%E4%B9%88%E6%98%AF%E5%85%B3%E9%94%AE%E5%AD%97"><span class="toc-number">1.3.1.</span> <span class="toc-text">什么是关键字:</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E6%9F%A5%E7%9C%8B%E5%85%B3%E9%94%AE%E5%AD%97"><span class="toc-number">1.4.</span> <span class="toc-text">查看关键字:</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E8%BE%93%E5%87%BA"><span class="toc-number">1.5.</span> <span class="toc-text">输出:</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E6%99%AE%E9%80%9A%E8%BE%93%E5%87%BA"><span class="toc-number">1.5.1.</span> <span class="toc-text">普通输出:</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E6%A0%BC%E5%BC%8F%E5%8C%96%E8%BE%93%E5%87%BA"><span class="toc-number">1.5.2.</span> <span class="toc-text">格式化输出:</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#%E6%A0%BC%E5%BC%8F%E5%8C%96%E6%93%8D%E4%BD%9C%E7%9A%84%E7%9B%AE%E7%9A%84"><span class="toc-number">1.5.2.1.</span> <span class="toc-text">格式化操作的目的:</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#%E4%BB%80%E4%B9%88%E6%98%AF%E6%A0%BC%E5%BC%8F%E5%8C%96"><span class="toc-number">1.5.2.2.</span> <span class="toc-text">什么是格式化:</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#%E5%B8%B8%E7%94%A8%E7%9A%84%E6%A0%BC%E5%BC%8F%E7%AC%A6%E5%8F%B7"><span class="toc-number">1.5.2.3.</span> <span class="toc-text">常用的格式符号:</span></a></li></ol></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E8%BE%93%E5%85%A5"><span class="toc-number">1.6.</span> <span class="toc-text">输入:</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#input"><span class="toc-number">1.6.1.</span> <span class="toc-text">input():</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%9A"><span class="toc-number">1.7.</span> <span class="toc-text">运算符：</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%9A"><span class="toc-number">1.7.1.</span> <span class="toc-text">逻辑运算符：</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E6%88%90%E5%91%98%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%9A"><span class="toc-number">1.7.2.</span> <span class="toc-text">成员运算符：</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#%E8%BA%AB%E4%BB%BD%E8%BF%90%E7%AE%97%E7%AC%A6%EF%BC%9A"><span class="toc-number">1.7.3.</span> <span class="toc-text">身份运算符：</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#%E6%B3%A8%E6%84%8F"><span class="toc-number">1.7.3.1.</span> <span class="toc-text">注意:</span></a></li></ol></li></ol></li></ol></li></ol></div></div></div><div class="card-widget card-recent-post"><div class="card-content"><div class="item-headline"><i class="fas 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